Oil-retaining means for gear casings



Feb. 25, 1930. w. c. STEWART ET AL 1,748,684

' OIL RETAINING MEANS FOR CTEAR CASINGS Filed Feb. 2, 1929 4 Sheets-Sheet 1 T Zlmwntoz5 Feb. 25, 1930. w. c. STEWART ET AL A OIL RETAINING MEANS FOR GEAR CASINGS Filed Feb. 2, 1929 4 Sheet s-Sheet 2 v q L,\ N Q R E I & R \1 TD M xx x A b M n *1- 1 51.

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OIL RETAINING MEANS FOR GEAR CASINGS Filed Feb. 2,. 1929 4 Sheets-Sheet 5 \l'lllllllll I K \V lfi m. x

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Feb. 25, 1930. w. c. STEWART ET AL 1,748,684

' omnanmme MEANS FOR GEAR GASINGS Filed Feb. 2. 1929 4 Sheets-Sheet 4 I Wfsf wrf I Patentecl Feb. 25,. 1930 WALTER o, sTEWAB'r AND EMANUEL FnoHMAu; OF. GASTONIAQNORTH SAID STEWART ssIGNon T SAID FR'OHMAN DIE-RETAINING eans FOR GEAR oasmes This invention relates to a differential unit for roving frames, spinning frames and the like, in which means are provided for worklng n-co-operation wlth thedrivlngmechanism for the roving frame andvarying the 7' speed of the bobbin .shafts, together with means forretaining the oil and lubricating material which is contained by the differential'unit. I r 7 An object of our invention is to vprovide a differential motion 'for roving frames by means of which the desired speed: may be imparted tothe bobbin shafts with the minimumiamount of loss in energy in accomplishing this result,'and. at the same time retain-.

ing'the lubricant within the diiferential'casing and allowing a thin lubricant tobe' used which will notescape from the differential:

housing.

in which all of the moving parts move in the same direction at differentspeeds so as: I

L 12 indicates the head, of theframe, and in f we 7 shaft 13xon which the cone pulley 14: is.

toprocure the properspeed for the bobbin 2. shafts with the minimum amountof power being wasted in attaining-this result, to-

V gether'with means for lubricating the various I parts of the machinerand retaining the lubri cant within the differential housingwhilethe same is being'operated. n a

' This application is; a continuation in part of the application of one of the inventors therein, namely5.W. 0, Stewart, said appliv' -=cati0n being Serial Number 295,036, filed vide a gear casing whichwill allow air to escape therefrom but which will prevent es- .cape ofthe lubricant" contained in the casj v r edithereon the geflTQZWlllCll gear engages-the ing.

7 ing been statedfother objects will appear as thedescriptionproceeds when taken in con-- nection withthe accompanyingdrawings, in Wh1ch 1 I Figure 1 is asideelevation of'a' portion Another'objectof'our invention is to pro-f vlde a dlfferential mot1on-for roving frames,

Some of the objectsof our invention'h'avenr oniue;

of a roving frame showing our invention" applied thereto;

Figure 2 is a longitudinal cross-sectional view; v

Figure 3 is a cross-sectional view taken alongthe line 33 in Figure 2; l I Figure is'an enlarged cross-sectional view of the central portion of the cover for the casing; v Figure 5 is a view of the portion ofthe Figure 6 is an enlarged side elevation partly in cross-section, showing one, of the sleeves; I p i i A v Figure 7 is a cross-sectional view take along the line 7-v7 in Figure 2; Figure 8 is across-sectional view tion of sleeve 36. a J I Referring more particularly to the drawings, the numeral 10 indicates the second: samsonof a roving frame, while the numeral 11 indicates the (first .samson' of a roving frame, and the numeralj of a 01 the first and second samsons is mounted the mounted and also mountedon theshaft is the gear wheel :15, and pivotally mounted:

drive-shaftbetween .the point 55 inFig. 2

on the shaft is the arm 16 which has thegear wheel 17 mounted thereon, which gear wheel meshes with the gear wheel .15, and also the gear wheel 18 ontl e main driveshaft19. I

In the lower portion of the firstjand second-samsons lOand 11 is fixedly mounted V theshaftQO, which has the pivoted arms 21' and 22 mounted thereon, and in the ends of these arms is rotatably mountedthe shaft 23 on, and runningbetween the cone pulleys 14 and 2 1 is the cone belt 25 which has-the cone belt rack or shifter 26 inengagement, therewithfor the purpose of guiding saidbelt on the cone pulleys. The shaftv20has mount gear-28 fixedly mounted on the shaft 23 the gear 27 being integral with the sleeve 29 and which has the cone-pulley 24 mounted there:

on this sleeve 29 is mounted the geari30,

which gear engagesthegeargl fixedly mount-,; ed .on the shaft'32. i Itmight be stated that theapart t us far descr ed re thMQ Qlltional parts of a roving frame, in addition to some other parts hereinafter described, our invention as applied to roving frames being more specifically shown in Figures 2 to 7.

Fixedly mounted on the shaft 32 is the gear wheel 33 which is adapted to receive the chain belt 34, which chain belt 34 is also mounted on the gear 35 which is fixedly mounted on the sleeve 36 in the diflerential, and this sleeve 36 has the gear teeth 37 integral therewith adapted to engage the pinions 38, 39 and 40, which pinions are mounted on the studs 41 which are fixedly secured to the disk 42, this disk 42 being integral with the sleeve 43. Fixedly mounted on the sleeve 43 by means of the set screw 46 and the slot and wedge means 47 is the gear wheel 48 which has the chain belt 49 mounted thereon, which chain belt is also mounted on the gear wheel 50 which is fixedly mounted on one of the bobbin shafts 51, said bobbin shaft having gear 52 thereon which is adapted to mesh with the gear 53 which is fixedly mounted on the other bobbin shaft 54. These bobbin shafts in Figure 1 are shown in elevated position, their proper position being immediately behind the roving frame differential, but they are lifted up for the sake of clearness.

The main drive shaft 19 has mounted thereon the loose pulley 55 and the tight pulley 56, which has integral therewith the hand wheel 57. This shaft 19 has fixedly mounted thereon the housing 58 by means of the set screw 59, said housing having the internal ,gear 60 around its entire periphery, which gear is adapted to engage the pinions 38, 39 and 40 which are mounted on the disk 42. The plate 61 is adapted to be secured to the housing 58 by means of the screws 62 and this plate 61' is adapted to fit around the sleeve 36. v

\Ve have found that in a structure as described where the drive shaft and'sleeve 43 and the sleeve 36 are all moving in the same direction that a lubricant placed within the gear casingformed by the members 58 and 61 will gradually creep out between the space between these members, and even though a thick grease is used this soon becomes emulsified, and is pushed out between the sleeve member and the drive-shaft. We have devised means whereby instead of the lubricant escaping from the gear casing that it will be retained in said gear casing due to certain features which we shall presently describe.

The hub portion of the member 61 has the spiral groove therein, which normally tends to feed the lubricant back into the gear casing. This member 61 has the four slanting holes designated by the reference charac ter 71 which is more clearly shown in Figures 2 and 7, which leads from the interior of the gear'casing downwardly into the groove 70 or in close proximity to this groove, and causes the oil to be sent down through this into the groove, which groove will feed the same back into the gear casing. The sleeve 43 has the spiral groove 72 on the outside thereof vwhich forces any lubricant which may tend to escape between the sleeves 36 and '43 back into the gear casing. This sleeve 43 also has the spiral groove 73 on the inside thereof, which forces the lubricant which may tend to escape between the inside of the sleeve and the drive shaft back into the gear casing. The drive shaft 19 has the spiral groove 74 therein which laps over the spiral groove on the inside of the sleeve 43, and these two grooves working together forces the lubricant back into the gear casing and keeps any lubricant from escaping from'the end of the sleeve 43. The pinions 38, 39 and 40 have the bushings 75 therein, and the hole 76 is drilled through the pinion and bushing for the pur pose of lubricating the bearingbetween the bushing 75 and the pin 41 Thesleeve 36 has the holes 77 drilled in the geared portion 37 which causes the lubricant to be forced through said hole by the action of the pinions 38, 39 and 40, and these holes are adapted to coincide with the hole 79 in the sleeve 43, which will force the oil into engagement with the drive'shaft, and the groove 74 on the drive shaft will deliver the lubricant back into the gear casing formed by the members 58 and 61.

With the arrangement described all parts of the'mechanism will bev thoroughly lubri cated, and by using the grooves as illustrated and described it is possible to use a very light lubricant within the gear casing, and yet prevent escape of the lubricant from the gear casing. Of course, it is evident that a slight amount of refuse or burnt-up oil may escape but this can be easily disposed of, without the dripping thereof off of the machinery onto other objects. It is a well known fact that with these gears working within the gear casing that the lubricant becomes emulsified and will be forced out of the casing unless some means are provided, and in the co-pend application of W. C. Stewart, which has been above referred to the grooves'were missing and it has been the experience of the applicants that a great quantity of lubricant has been forced out between the sleeves and the drive shaft, and the grooves herein illustrated and described-were devised to prevent the escape of this lubricant, which purpose they perform very efficiently.

The sleeve 36 has the groove 80 in close proximity to the gear teeth 37 into which the oil is fed by the grooves 70 in the member 61 and from this the oil flows in between the I gear teeth 37, where it is forced through the holes 77 and 79 in the sleeves 36' and 43. While we have shown our oil retaining arrangement applied to a difierential for roving frames and the like, we desire it to be understood that it may be applied to any gear housing in which the oil is desired to be retained in the housing without escaping there-v from, it beingevident that this feature may' bewapplied to a great number of uses in oi 1 retaining devices for gear-casings. The clearance between the'sleeves 36 anc 43, and the sleeve 36gand the hub portion of 61, and between the sleeve 43 and the drive shaft, 19 is close enoughto allow the air to escape from the casing thru the grooves, but these grooves feed the lubricant back into the casing. It is evident that when the casing' has a lubricant added thereto and the parts.

set in motion that the lubricant will be emulsified to some extent and the temperature of the lubricant will rise due to friction of parts, and this will cause the air to expand and escape from the casing, and were it not for the grooves, the lubricant would be forced out of the casing also. v

. XVhile the member 58 ismaking onecomplete revolution, andif the sleeve and gearwheel 36 are held stationary the disk 42 and 48 mounted thereon whichare both mounted on the sleeve t3 makes seventy-four one hundrcdths of a revolution. 'l/Vhile the sleeve 36 makes one complete revolution and the casing 58 being held stationary the disk 42,

which carries the pinions thereon makes twenty-six one'hundredths of a revolution.

1 On the ordinary roving frame differential using bevel gears in a epicyclic train the cone acting through shaft 32 and the pinion running from a bevel gear such as islocated at 33 (and meshing into a large sun Wheel in the rovmg frame differential, the large sun wheel is driven: in the opposite direction to 1 f the direction of rotation of theidriving'meming through shaft '32, sprocket :33, chain'34 and sprocket; 35 onsleeve'36 rotates sleeve -36, on whichlis mounted the gear 37, in ,the same direction as the main housing 58 rotatesthe gear 60 made integral therewith,

ber which is a bevelgear in the old roving frame instead of the hous ng'58 as shown in our invention. In this invention cone actas the main housing 58 is secured to the drive shaft 19. This causes the pinions 38, 39 and 40 to be rotated around-their own centers and around-the axis of the drive shaft, moving pinions 41 disk 42 sleeve 43, sprocket wheel 48 in the SHIHGCilI'GCiDlOIl as. the driving partsare moving.- In other words all rotating members 10f the applicants invention moves in the same directlon, which means a great saving in horsepower on accountof a 'minimum amount of friction being developed." Furthermore, appl cants, mechanism can be turned by hand wh1le the same is disconnected from a machine and motor,

while in the old type of roving frame differential having the bevelgears they are'locked imposition and cannot be moved except by great force from a prime mover. A further test of the saving of power in the twotypes "of differentials is proven by the fact that When the power is taken away from'the old type of differential it will stopalmost immediately while in the newtype as shown in applicants invention the "whole mechanism will continue to move after power, is removed, which operates on the principle of a flywheel and allows thevmomentum tobeextended, 1

which in itself proves that the friction ofapplica-nts structure'toa great degree less-thanf in theold structure heretofore. used.

, In the drawmgs and ,specifijcatlon We have set fo'rtha preferred embodiment of, 0min for roving frames M having an lnternalgeanfixedly mounted on the driving shaft, a sleeve mounted directly on the driving shaft for rotation thereon and having a disk secured thereto', a' -plurality of pmions mounted for rotation. on the disk and beingi'adapted to engage the said internal gear, a second-sleeve mounted for rotation on the first named sleeve and having a gear-wheel thereon adapted -to:' engage the said pinions, spiral grooves onsaid driving ,shaft, the interior of the first namedlsleeve, the exterior of the first named sleeve, andthe interior of the cover, all of said spiral grooves being adapted to feed the lubricant back intothe 1 casing and to allow airtoescape therefrom.

2;;Ina differential unit for roving vframes andthe like, comprising ,a driving shaft, a. sealed housing member having an internal gear therein and being fixedly mounted on the driving shaft,"a sleeve rotatab'ly mounted directly on the driving shaft and having a gear fixedly mounted thereon, a second sleeve mounted on the first named sleeve and having a disk integral thereon, said disk being entirely within the sealed housing and enclosed "thereby, said disk also having a plurality of pinions. nio uiitedthereon adapted 'to' engage Jth'e-l internal gear and i I also'toengage-theY-gear oni'the said sleeve,

spiral grooves on the exterior ;of the driving shaft and the exterior "of the first named sleeve and also-on the interior of the first named sleeve and the interior of the hole in the sealed housing through which the second named sleeve projectsall of s'aid grooves bering adapted to feedOilb'ackinto the casing and to allowair to escape therefrom.

' 3, In adifferential motion forroving frames and thej'lik'e, amain drive Shaina housing memberhaving an 1nternalgear'se-f cured on the main drive shaft, a cover-fen said housing" member fixedly mounted-there on, a sleeve rotatably mountedon the ma n drive sha ft and having a; portion thereof ex;

tending intothe member having the internal shafts adapted to feed lubricant back into gear, a disk secured to said sleeve, said disk the casing.

being sealed in the casing, a plurality of pin- In testimony whereof We aflix our signaions secured on the disk and being adapted tures.

5 to mesh with the internal gears on the said WALTER C. STEl/VART.

housing member, a. second sleeve member ro- V EIVIANUEL FROHMAN.

tatably mounted on the first named sleeve member and having a gear thereon adapted to mesh with the said pinions, a gear wheel v 10 mounted on the first named sleeve, and a gear wheel mounted on the second named sleeve, and spiral grooves located on the exterior of the drive shaft and the first sleeve and on the interior of the cover for said housing mem- 15 her, all of said spiral grooves being adapted v to feed lubricant back into the casing to prevent escape of the same therefrom and to allow air to escape through said grooves.

4. In a roving frame and the like having a a 20 main drive shaft, a hollow circular casing I fixedly secured on the drive shaft, and having a bottom member integral therewith, a cover member fixedly secured on the casing, a hole in said cover member, an internal gear on r 2 the periphery of said casing, a sleeve rotata- 7 bly mounted directly on the drive shaft and having a major portion thereof on the outside of the casing with one of its ends projecting into the casing, a disk fixedly mounted 39 on the end of the said sleeve in the housing,

pinions on said disk adapted to mesh with the said internal gear, a gear wheel on the exterior end of said sleeve, a'second sleeve rotatably mounted on the said first sleeve and having one end thereof projecting through the hole in said cover into the casing forming a close fit in said hole, and having a spur gear on the other end within the casing, which 40 spur gear is adapted to mesh with said pina V ions, and a gear mounted on the portion of said second sleeve outside of the casing, and spiral grooves between said sleeves and said drive shaft adapted to feed lubricant back 45 into the casing to prevent the escape thereof v from the casing and to allow air bubbles to escape therefrom. V

5. In a differential motion, a casing, a cover for said casing, a drive shaft projecting v 0 through said casing and said cover and being a v fixedly secured to said casing, a sleeve rotatably mounted on said drive shaft and projecting into said casing, and having a disk portion integral therewith within the casing, an

55 internal gear in said casing, a plurality of pinions mounted on said disk and being adapted to mesh with said internal gear, a second sleeve rotatably mounted on the first 60 sleeve and having a spur gear thereon Within the casing adapted to mesh with saidpinions, holes drilled at an angle from the interior, of the casing through said cover to a point short of the outer edge of, said hole, a plurality of I 65 spiral grooves on said sleeves and said drive a p a 

